Spring damping car truck



Jan.17,1933. EW, WEBB 1,894,385`

SPRING DAMPING CAR TRUCK vFiled Feb. 13, 1932 y 2 .Sheets-Sheel'". 2

FZ f' E f 9 Il A Patented. .lang l?, 133

Ira'rlnv'r ori-rcs y w. wma, or cvHIcaGo, rumors, assIGNoR 'ro STANDARD can TRUCK COMPANY,

03E' CHICAGO, ILLNOIS, A CORPOltA'llIOlfll OF NEW JERSEY SPRNG DMPING CAR TRUCK Application led February 13, 1932. Serial No. 592,721.

This invention relates to spring damping means for car trucks.

lt is the general object ot the invention to provide novel and improved means for check- Y o ing ordamping the action. of the bolster springs of a car truck as forces tending to compress these 'springs are increased.

lt is another object to provide in combina- .tion with said dam ing means, means for lo supporting the truc bolster to ,permit of lateral motion of the same transversely of the truck.

To these ends, generally stated, the invention consists in the novel parts and novel lo combinations of parts, hereinafter deined in the claims and described in the following specification, made in connection with the accompanying drawings, wherein like refer-- ence characters refer to the same or similar go parts throughout the various views, and, in

which,

Fig. 1 is a v/iew partly in side elevation and partly in vertical longitudinal section, taken through portions of a car truck wherein the 25 present invention is embodied;

Fig. 2 is a horizontal section taken substantially on the line 2-2 oi Fig. 1, as indicated by the arrows; and v Fig. 3 is a vertlcal transverse section taken 3o substantially on the line 3 3 of Fig. 1', as

y indicated by the arrows.

Referring to the drawings, portions of a car truck are illustrated which include a side traine 4 having a bolster opening 5 within $55 which one end of a car truck bolster 6 is disposed. One end of a spring plank 7, disposed' within the vbolster opening 5, rests on the side frame 4 and a group/of coiled bolster springs 8 are supported at their lower ends within 4@ the bolster opening on this end of the springplank 7. Bolster columns are formed by vertical side webs 9 integral with the side frame d andcross webs 10 joining the side webs 9. These cross webs 10 run at sharp angles to t5 the vertical upwardly and outwardly toward 50 the inner surfaces thereof as by rivets 11 are wear plates 12.- The side frame t forms. an arch bar 13 of channel shape in vertical cross section,I which traverses the upper portion of the bolster opening 5.

A combination roller seat and chang member 14 is disposed within the bolster opening 5 and this member has a horizontal bottom 14a which rests upon the upper ends of the bolster` springs 8. Laterally spaced roller contours 146 are formed on the upper surface of the bottom 14a and supported within these' contours are lateral motion rollers 15 which fit within laterally spaced roller contours 6a formed on the bottom surface of the end of bolster 6. The end of the bolster 6 is accordingly supported for lateral motion transversely of the truclr. and relative to the side frame fl by the rollers 15 resting on the' combination roller seat and chahng member 14C which is, in turn, supported by the bolster springs 8. 'llhe chang member 14 has vertical sides 11i@ of channelshape in horizontal cross section which partially receive the inner edges of the side webs 9 'of the bolster columns. sides 140 of the chaing member are interconnected in spaced relationabove the bolster 6 by a top 14d of channelshape in vertical cross section. Slots 14e are formed in the sides 14:0 innnediately below the upper web of the channel-shaped top 1403 and a bar 16 fits wit rin the channel of the top 14d and has ends which project outwardly'through the slots 14e beyond the sides 14e of the chaing member. Spring caps 17 are secured to the ends of this bar 16 as bymeans of rivets 18.

interposed between the sides 140 of the chaiing member 14 and the wear plates 1.2

are wedges 19 of generalv cup-shape. rlhese Wedges 19 have heavyinner vertical ribs 19a which bear `against the sides 14o of the chating member 14 and are located between the inner edges of thewebs 9 and the sides 140. V'.lhe wedges 19 have outer sides`19 paralleling the cross webs 10 of the bolster columns and bearing against the wear plates l2. Coiled springs 20 iii-within the recesses of the ouplike wedges 19\,`have bearings at their lower ends against bottom horizontal surfaces of the Wedges and have bearing at their upper The two 19 have down turned flanges 19d joining the inner edges of the bottoms of the wedges and interconnecting the Aribs 19a and worklng against the sides 140.

' It will be understood that the lopposite end of the bolster 6 from the end shown in the drawings will 'be supported by a side frame.

structure which isl a duplicate of the structure described and illustrated.

`Whe`n the car truck is in service, as the wheels of the truck run over high'spots on v the rails, the Ybolster springs 8 will be compressedthereby causing the end of the bolsterV 6 supported by the side frame4, to lower somewhat relative to the side frame to move the chating member 14:l downwardly somewhat rela-tive to the bolster columns formed by the side webs 9 'and cross webs 10. The bar 16 will be moved downwardly with'the chaiing member 14 and will, accordingly,

YMap/exert pressure to compress the springs 20,

- thereby tending to move the wedges 19 downwardly relative to cross webs 10. The wedges 19 accordinglywill be urged into tighter engagement with the sides 140 of the chafing 3o member and with the wear plates 12. rlihe frictional engagement ofthe ribs 19a with the sides 14o of the chaing member offers resistance to the downward movement of the chang member relative to side frame 4, and

S5 thus clamps the compressive action of the springs 8. The added resistance oifered by the Wedges 19 to the compressive movement of the springs 8 increases tremendously as the forces tending to compress the springs 8 are .21e/increased. ln other words, as the springs 8 Ware increasingly compressed, the added resistance offered by thewedges to the compressive movement of the springs will be much more than directly proportional to the increase in the forces tending to compress the springs. .The angle formed by the webs 12 with the vertical is Apreferably .such as to furnish maximum frictional resistance to sliding movement of the ribs 19carelative to the sides 140 of the chafing member, without causing sticking of the parts.

At all times, the truck bolster 6 will have freedom for lateral motion transversely of the truck and ,relative to the side frames 4:.

The lateral motion rollers 15 supportedgon the combination roller seat Vand chang members and, in turn, supporting the .ends of the truck bolster 6, make-this lateral motion of the truck bolster possible.

1t will be apparent that if it isdesired to eliminate the lateral ymotion feature of the present truck; this can easily be done by modifying the .construction slightly. The words truck bolster structure as used in the c3 claims' are to beconstrued broadly enough to cover vany suitable bolster such as an ordinary bolster not equipped with the combination roller seat and chafing members 14, and rollers 15, as well as a bolster construction including such parts as bolster 6 combination roller seat andQ chafing' members 14 and rollers 15.

lt will, of course, be understood that various changes may lbe made in the form, details, arrangement and proportions of the variousparts, without departing from the scope of the present invention. i

What is claimedis f\ 1. 1n a car truck, side frames having bolster openings, a truck bolster structure having `its ends disposed within said bolster openings, springs supporting the ends of said bolster structure from-v said side frames, Wedges interposed between the sides of said bolster structure and portions of said side frames, and resilient means reacting between said'.wedges and said bolster structure to.

urge said wedges into tighter wedging relation as said springs are increasingly compressed.

2. 1n a car truck, side frames having bolster openings, a truck bolster structure having ends disposed within said bolster openings,v

means for supporting the ends of said bolster structure from said side frames to permit bf relative vertical movement', between said bolster structure and said side frames, wedges interposed between the sides of'the ends of- `said bolster structure and portions of said side frames and resilient means reacting in a vertical direction between the ends of sald truck bolster structure and said wedges to v force said wedges into tighter wedging relation with the sides of the ends of said-bolster structure asrelative vertical movement between said bolster structure and said side frames takes'place in one direction.

3. ln a car truck, side frames having' bolster openings, a truck bolster structure having its" ends disposed within sald bolster openings, springs supporting the ends of said" bolster structure from said' side frames, said side frames having webs extending diag.- onally upwardly and away from the sides of said bolster structure, wedges interposed between said webs and the sides of said bolster v structure and resilient means reacting between the ends of said bolster structure and said wedges to force said wedges into tighter wedging relation as said springs are increasingly compressed. I l 4.i 1n -a car'truck, side frames havmg bolster openings, a truck bolster having its ends .dise posed within said bolster openingsmsprmgs supported within said bolster openings by said side frames, chafing members supported by said sprin s and'in turn supporting the ends of said olster, wedges interposed between the s1des of saidv chafing members and 13 portions of'said side frames and springs resprings reacting in a vertical direction between said chang members and said wedges to force said wedges into tighter wedging relation as said bolster springs are increas,

ingly compressed. v

6. In a car truck, side frames having bolster openings, a truck bolster having ends disposed within said bolster openings, bolster springs supported by said side frames, chang members supported by said bolster springs and having openings therein within which the ends of said bolster are received, lateral motion rollers interposed between said chafing members and the ends ofsaid bolster to permit of lateral motion of said bolster relative to said side' frames, wedges interposed between the sides of said chafing members and portions of said side frames, and springs reacting between said chafingmembers and said wedges in a vertical direction to urge said wedges into tighter wedging relation as said bolster springs are compressed.

members, wedges inter osed between said diagonally inclined sur aces and the sides of said chaing members and springs reactin vertically between said chaing members an said wedges and urging said wedges into tighter wedging relation as said bolster springs are increasingly compressed.

In testimony whereof I aix my si ature.

EDWIN W. W BB.

ao v

7. .Inaeartruclgside frames having bolster openmgs, a truck bolster having ends disposed within said openings, bolster springs supported by said side frames, chafn members supported Aby said springs and aving openings therein through which the ends of said bolster project, lat-eral motion rollers interposed between said chafing members and the ends of said bolster, wedges interposed between the sides of said chafing members and portions ofsaid side frames, the sides of said chang members having slots therein above the endsof said bolster, bars extending through said slots and springs reacting between the ends of saidbars and said wedges to urge said wedges into tighter wedging'relation as said bolster springs are lncreasingly compressed.

8. The structuredened `in claim 6, said wedges being cupped to receive the last mentioned springs.

" 9. In a car truck, side frames having bolster openings, and diagonally upwardly inclined surfaces projecting outwardly from the lower ends of said bolster openings, bolsterl springs supported by said side frames', chafing members supported by said bolster springs, lateral motion devices supporting the ends of said bolster from said chang 

